but it doesn't apply. Why?
Please, make sure that you show exactly what you entered
Otherwise we will complain about something that is only a typo in the forum
(XX_SQ00.NAOK=="Y" or XX_SQ002.NAOK=="Y" or !is_empty(XX_other)
And in your screenshot we see
(D1_SQ003=="Y" or D1_SQ004=="Y" or !is_empty(D1_other)
Here it is obvious.
Missing ".NAOK"
If you select an exclusive option all other options are undefined, not "".
Therefore always the best: Provide a lss export if thes relevant questions.
Copy the survey, remove everything not relevant, export and send the rest
Joffm